ListenerExample/Main.java

Main.java

public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        RandomGenerator randomGenerator = new RandomGenerator();
        randomGenerator.setListener(new OnNumberGeneratedListener() {
            @Override
            public void onNumberGenerated(int number) {
                System.out.println(number);
            }
        });

        while(true) {
            scanner.nextLine();

            randomGenerator.requestNumber();
        }

    }
}